Am using m4 as my daily driver for about two weeks no issues till now the battery backup is really awesome and the heating is average.So if you are looking to take this awesome device take it.After all its sony's product.The build quality is really awesome.This will be the best midrange phone that is available in the market right now.

Sajid123, 02 Sep 2015Hi guys, I want to update software, please can anybody tell me, if there will any hang problem... moreyou should probably look more into it before buying the phone. I've had mine for about a month and it needs to be reset all the time because of some problems. It starts randomly overheating even when everything is turned off and all the apps are closed.

Updated recently from Sony Xperia SP to M4 Aqua... With the sony software everything I had in my old phone was transfered to the new one without any problems and without me doing any manual transfers... Battery lasts at least 2 days with many hours of music and a lot of talking. Not tested the camera yet, but overall satisfied with the purchase...

AndyPhoenix9879, 29 Aug 2015The specifications is wrong about the multi-touch, it's up to like 9 fingers. Tested with Ant... moreI have the Xperia M and I'm going to buy the M4 Aqua too, lol
I'm excited

Bought an M4 Aqua last Tuesday , lasted 2 hours, sought help on Sony website, found solution to restart by sticking a pin into a tiny hole inside sd card slot, problem happens after 10 minutes every time I use it, returned the phone within 24 hours, explained the situation,
emobile/meteor shop in Galway shopping centre, point blank refused to replace/refund the phone, 'company policy' I was told .... Returned to the shop 3 days running, Same answer every day, even when I brought it back ,completely shut down, Manager (Liam) restarted it with a pin & said it's fine now...... Seeking legal advice about the issue.